/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/recursive-simple/id_o10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-07 00:42:27,607 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-07 00:42:27,610 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-07 00:42:27,658 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-07 00:42:27,659 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-07 00:42:27,661 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-07 00:42:27,663 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-07 00:42:27,665 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-07 00:42:27,668 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-07 00:42:27,669 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-07 00:42:27,670 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-07 00:42:27,672 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-07 00:42:27,673 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-07 00:42:27,674 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-07 00:42:27,675 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-07 00:42:27,677 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-07 00:42:27,679 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-07 00:42:27,680 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-07 00:42:27,682 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-07 00:42:27,685 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-07 00:42:27,687 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-07 00:42:27,689 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-07 00:42:27,691 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-07 00:42:27,693 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-07 00:42:27,697 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-07 00:42:27,697 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-07 00:42:27,697 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-07 00:42:27,703 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-07 00:42:27,704 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-07 00:42:27,705 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-07 00:42:27,706 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-07 00:42:27,707 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-07 00:42:27,708 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-07 00:42:27,710 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-07 00:42:27,711 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-07 00:42:27,712 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-07 00:42:27,713 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-07 00:42:27,713 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-07 00:42:27,714 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-07 00:42:27,715 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-07 00:42:27,716 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-07 00:42:27,717 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-11-07 00:42:27,740 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-07 00:42:27,741 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-07 00:42:27,743 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-07 00:42:27,743 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-07 00:42:27,744 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-07 00:42:27,746 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-07 00:42:27,746 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-07 00:42:27,746 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-07 00:42:27,747 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-07 00:42:27,747 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-07 00:42:27,748 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-07 00:42:27,748 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-07 00:42:27,749 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-07 00:42:27,749 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-07 00:42:27,749 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-07 00:42:27,750 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-11-07 00:42:27,750 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-07 00:42:27,750 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-07 00:42:27,750 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 00:42:27,751 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-07 00:42:27,751 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-11-07 00:42:27,751 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-07 00:42:27,751 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-07 00:42:28,235 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-07 00:42:28,269 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-07 00:42:28,273 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-07 00:42:28,276 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-07 00:42:28,277 INFO L275 PluginConnector]: CDTParser initialized [2020-11-07 00:42:28,278 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_o10.c [2020-11-07 00:42:28,376 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b74de86d8/8fae90d071404ff9a52bb84f7e9d9cca/FLAGfd21173c1 [2020-11-07 00:42:29,150 INFO L306 CDTParser]: Found 1 translation units. [2020-11-07 00:42:29,151 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_o10.c [2020-11-07 00:42:29,160 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b74de86d8/8fae90d071404ff9a52bb84f7e9d9cca/FLAGfd21173c1 [2020-11-07 00:42:29,503 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b74de86d8/8fae90d071404ff9a52bb84f7e9d9cca [2020-11-07 00:42:29,508 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-07 00:42:29,516 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-07 00:42:29,519 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-07 00:42:29,520 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-07 00:42:29,524 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-07 00:42:29,526 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:42:29" (1/1) ... [2020-11-07 00:42:29,530 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d2b09ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:42:29, skipping insertion in model container [2020-11-07 00:42:29,531 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:42:29" (1/1) ... [2020-11-07 00:42:29,541 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-07 00:42:29,557 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-07 00:42:29,750 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 00:42:29,765 INFO L203 MainTranslator]: Completed pre-run [2020-11-07 00:42:29,785 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 00:42:29,805 INFO L208 MainTranslator]: Completed translation [2020-11-07 00:42:29,806 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:42:29 WrapperNode [2020-11-07 00:42:29,806 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-07 00:42:29,808 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-07 00:42:29,808 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-07 00:42:29,808 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-07 00:42:29,825 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:42:29" (1/1) ... [2020-11-07 00:42:29,825 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:42:29" (1/1) ... [2020-11-07 00:42:29,834 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:42:29" (1/1) ... [2020-11-07 00:42:29,835 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:42:29" (1/1) ... [2020-11-07 00:42:29,842 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:42:29" (1/1) ... [2020-11-07 00:42:29,845 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:42:29" (1/1) ... [2020-11-07 00:42:29,846 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:42:29" (1/1) ... [2020-11-07 00:42:29,848 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-07 00:42:29,850 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-07 00:42:29,850 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-07 00:42:29,850 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-07 00:42:29,851 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:42:29" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 00:42:29,957 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-07 00:42:29,958 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-07 00:42:29,958 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-07 00:42:29,958 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-11-07 00:42:29,959 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-07 00:42:29,959 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-11-07 00:42:29,959 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-07 00:42:29,959 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-07 00:42:29,959 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-07 00:42:29,960 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-07 00:42:29,960 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-11-07 00:42:29,960 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-07 00:42:29,960 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-07 00:42:29,961 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-07 00:42:29,961 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-07 00:42:29,961 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-07 00:42:29,961 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-07 00:42:29,962 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-07 00:42:30,333 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-07 00:42:30,334 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-11-07 00:42:30,336 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:42:30 BoogieIcfgContainer [2020-11-07 00:42:30,336 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-07 00:42:30,339 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-07 00:42:30,339 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-07 00:42:30,343 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-07 00:42:30,344 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 12:42:29" (1/3) ... [2020-11-07 00:42:30,345 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25892ac3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:42:30, skipping insertion in model container [2020-11-07 00:42:30,345 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:42:29" (2/3) ... [2020-11-07 00:42:30,346 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25892ac3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:42:30, skipping insertion in model container [2020-11-07 00:42:30,346 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:42:30" (3/3) ... [2020-11-07 00:42:30,349 INFO L111 eAbstractionObserver]: Analyzing ICFG id_o10.c [2020-11-07 00:42:30,369 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-07 00:42:30,373 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-07 00:42:30,390 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-07 00:42:30,418 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-07 00:42:30,419 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-07 00:42:30,419 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-11-07 00:42:30,419 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-07 00:42:30,419 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-07 00:42:30,420 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-07 00:42:30,420 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-07 00:42:30,420 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-07 00:42:30,438 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-11-07 00:42:30,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-07 00:42:30,450 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:42:30,451 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:42:30,452 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:42:30,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:42:30,460 INFO L82 PathProgramCache]: Analyzing trace with hash -2039876327, now seen corresponding path program 1 times [2020-11-07 00:42:30,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:42:30,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2130665822] [2020-11-07 00:42:30,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:42:30,558 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:42:30,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:42:30,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:42:30,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:42:30,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-11-07 00:42:30,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:42:30,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 00:42:30,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2130665822] [2020-11-07 00:42:30,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:42:30,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-07 00:42:30,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246772068] [2020-11-07 00:42:30,917 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-07 00:42:30,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:42:30,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-07 00:42:30,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-07 00:42:30,940 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 6 states. [2020-11-07 00:42:31,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:42:31,319 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2020-11-07 00:42:31,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-07 00:42:31,321 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2020-11-07 00:42:31,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:42:31,333 INFO L225 Difference]: With dead ends: 50 [2020-11-07 00:42:31,333 INFO L226 Difference]: Without dead ends: 31 [2020-11-07 00:42:31,338 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-11-07 00:42:31,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-11-07 00:42:31,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-11-07 00:42:31,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-11-07 00:42:31,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2020-11-07 00:42:31,401 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 25 [2020-11-07 00:42:31,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:42:31,401 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2020-11-07 00:42:31,401 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-07 00:42:31,402 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2020-11-07 00:42:31,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-11-07 00:42:31,404 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:42:31,404 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:42:31,405 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-07 00:42:31,405 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:42:31,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:42:31,406 INFO L82 PathProgramCache]: Analyzing trace with hash -1789799325, now seen corresponding path program 1 times [2020-11-07 00:42:31,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:42:31,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2076883802] [2020-11-07 00:42:31,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:42:31,413 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:42:31,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:42:31,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:42:31,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:42:31,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-11-07 00:42:31,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:42:31,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-07 00:42:31,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:42:31,725 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-07 00:42:31,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2076883802] [2020-11-07 00:42:31,726 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:42:31,726 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-07 00:42:31,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535156568] [2020-11-07 00:42:31,728 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-07 00:42:31,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:42:31,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-07 00:42:31,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-11-07 00:42:31,730 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 8 states. [2020-11-07 00:42:32,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:42:32,181 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2020-11-07 00:42:32,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-07 00:42:32,182 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2020-11-07 00:42:32,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:42:32,184 INFO L225 Difference]: With dead ends: 41 [2020-11-07 00:42:32,184 INFO L226 Difference]: Without dead ends: 35 [2020-11-07 00:42:32,187 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-11-07 00:42:32,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-11-07 00:42:32,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-11-07 00:42:32,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-11-07 00:42:32,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2020-11-07 00:42:32,202 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 32 [2020-11-07 00:42:32,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:42:32,203 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2020-11-07 00:42:32,203 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-07 00:42:32,203 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2020-11-07 00:42:32,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-11-07 00:42:32,205 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:42:32,205 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:42:32,206 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-07 00:42:32,206 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:42:32,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:42:32,207 INFO L82 PathProgramCache]: Analyzing trace with hash 819538851, now seen corresponding path program 2 times [2020-11-07 00:42:32,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:42:32,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [702783196] [2020-11-07 00:42:32,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:42:32,211 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:42:32,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:42:32,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:42:32,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:42:32,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-11-07 00:42:32,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:42:32,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-07 00:42:32,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:42:32,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-07 00:42:32,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:42:32,483 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-11-07 00:42:32,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [702783196] [2020-11-07 00:42:32,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:42:32,485 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-11-07 00:42:32,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271783471] [2020-11-07 00:42:32,486 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-07 00:42:32,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:42:32,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-07 00:42:32,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-11-07 00:42:32,488 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 10 states. [2020-11-07 00:42:33,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:42:33,117 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2020-11-07 00:42:33,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-07 00:42:33,118 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2020-11-07 00:42:33,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:42:33,120 INFO L225 Difference]: With dead ends: 45 [2020-11-07 00:42:33,120 INFO L226 Difference]: Without dead ends: 39 [2020-11-07 00:42:33,121 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2020-11-07 00:42:33,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-11-07 00:42:33,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-11-07 00:42:33,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-11-07 00:42:33,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-11-07 00:42:33,134 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 39 [2020-11-07 00:42:33,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:42:33,135 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-11-07 00:42:33,135 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-07 00:42:33,135 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-11-07 00:42:33,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-11-07 00:42:33,137 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:42:33,137 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:42:33,138 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-07 00:42:33,138 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:42:33,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:42:33,138 INFO L82 PathProgramCache]: Analyzing trace with hash 1214666029, now seen corresponding path program 3 times [2020-11-07 00:42:33,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:42:33,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [759427721] [2020-11-07 00:42:33,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:42:33,142 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:42:33,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:42:33,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:42:33,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:42:33,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-11-07 00:42:33,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:42:33,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-07 00:42:33,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:42:33,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-07 00:42:33,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:42:33,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-07 00:42:33,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:42:33,493 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-11-07 00:42:33,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [759427721] [2020-11-07 00:42:33,494 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:42:33,494 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-11-07 00:42:33,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595415080] [2020-11-07 00:42:33,495 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-07 00:42:33,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:42:33,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-07 00:42:33,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-11-07 00:42:33,497 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 12 states. [2020-11-07 00:42:33,823 WARN L194 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-11-07 00:42:34,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:42:34,517 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-11-07 00:42:34,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-07 00:42:34,517 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 46 [2020-11-07 00:42:34,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:42:34,519 INFO L225 Difference]: With dead ends: 49 [2020-11-07 00:42:34,519 INFO L226 Difference]: Without dead ends: 43 [2020-11-07 00:42:34,521 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2020-11-07 00:42:34,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-11-07 00:42:34,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-11-07 00:42:34,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-11-07 00:42:34,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2020-11-07 00:42:34,534 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 46 [2020-11-07 00:42:34,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:42:34,534 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2020-11-07 00:42:34,534 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-07 00:42:34,534 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2020-11-07 00:42:34,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-07 00:42:34,536 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:42:34,536 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:42:34,536 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-07 00:42:34,537 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:42:34,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:42:34,537 INFO L82 PathProgramCache]: Analyzing trace with hash -461443027, now seen corresponding path program 4 times [2020-11-07 00:42:34,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:42:34,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [245039749] [2020-11-07 00:42:34,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:42:34,541 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:42:34,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:42:34,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:42:34,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:42:34,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-11-07 00:42:34,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:42:34,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-07 00:42:34,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:42:34,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-07 00:42:34,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:42:34,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-07 00:42:34,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:42:34,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-07 00:42:34,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:42:34,961 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-11-07 00:42:34,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [245039749] [2020-11-07 00:42:34,963 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:42:34,963 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-11-07 00:42:34,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529711939] [2020-11-07 00:42:34,964 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-07 00:42:34,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:42:34,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-07 00:42:34,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-11-07 00:42:34,965 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 14 states. [2020-11-07 00:42:36,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:42:36,178 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2020-11-07 00:42:36,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-07 00:42:36,180 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 53 [2020-11-07 00:42:36,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:42:36,182 INFO L225 Difference]: With dead ends: 53 [2020-11-07 00:42:36,183 INFO L226 Difference]: Without dead ends: 47 [2020-11-07 00:42:36,186 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2020-11-07 00:42:36,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-11-07 00:42:36,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-11-07 00:42:36,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-11-07 00:42:36,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2020-11-07 00:42:36,218 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 53 [2020-11-07 00:42:36,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:42:36,219 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2020-11-07 00:42:36,221 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-07 00:42:36,221 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2020-11-07 00:42:36,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-11-07 00:42:36,228 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:42:36,229 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:42:36,229 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-07 00:42:36,229 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:42:36,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:42:36,230 INFO L82 PathProgramCache]: Analyzing trace with hash 1951577079, now seen corresponding path program 5 times [2020-11-07 00:42:36,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:42:36,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1612674309] [2020-11-07 00:42:36,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:42:36,237 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:42:36,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:42:36,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:42:36,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:42:36,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-11-07 00:42:36,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:42:36,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-07 00:42:36,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:42:36,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-07 00:42:36,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:42:36,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-07 00:42:36,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:42:36,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-07 00:42:36,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:42:36,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-07 00:42:36,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:42:36,782 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-11-07 00:42:36,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1612674309] [2020-11-07 00:42:36,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:42:36,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-11-07 00:42:36,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137561206] [2020-11-07 00:42:36,784 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-07 00:42:36,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:42:36,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-07 00:42:36,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-11-07 00:42:36,786 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 16 states. [2020-11-07 00:42:38,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:42:38,299 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2020-11-07 00:42:38,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-11-07 00:42:38,300 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 60 [2020-11-07 00:42:38,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:42:38,302 INFO L225 Difference]: With dead ends: 57 [2020-11-07 00:42:38,303 INFO L226 Difference]: Without dead ends: 51 [2020-11-07 00:42:38,307 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=123, Invalid=1067, Unknown=0, NotChecked=0, Total=1190 [2020-11-07 00:42:38,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-11-07 00:42:38,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-11-07 00:42:38,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-11-07 00:42:38,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-11-07 00:42:38,328 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 60 [2020-11-07 00:42:38,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:42:38,328 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-11-07 00:42:38,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-07 00:42:38,329 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-11-07 00:42:38,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-11-07 00:42:38,338 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:42:38,338 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:42:38,339 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-07 00:42:38,339 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:42:38,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:42:38,340 INFO L82 PathProgramCache]: Analyzing trace with hash -1085586761, now seen corresponding path program 6 times [2020-11-07 00:42:38,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:42:38,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1222805857] [2020-11-07 00:42:38,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:42:38,345 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:42:38,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:42:38,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:42:38,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:42:38,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-11-07 00:42:38,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:42:38,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-07 00:42:38,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:42:38,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-07 00:42:38,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:42:38,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-07 00:42:38,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:42:38,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-07 00:42:38,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:42:38,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-07 00:42:38,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:42:38,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-07 00:42:38,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:42:38,953 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-11-07 00:42:38,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1222805857] [2020-11-07 00:42:38,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:42:38,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2020-11-07 00:42:38,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184734922] [2020-11-07 00:42:38,956 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-07 00:42:38,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:42:38,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-07 00:42:38,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2020-11-07 00:42:38,958 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 18 states. [2020-11-07 00:42:40,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:42:40,793 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-11-07 00:42:40,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-07 00:42:40,794 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 67 [2020-11-07 00:42:40,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:42:40,797 INFO L225 Difference]: With dead ends: 61 [2020-11-07 00:42:40,798 INFO L226 Difference]: Without dead ends: 55 [2020-11-07 00:42:40,802 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=142, Invalid=1418, Unknown=0, NotChecked=0, Total=1560 [2020-11-07 00:42:40,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-11-07 00:42:40,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-11-07 00:42:40,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-11-07 00:42:40,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2020-11-07 00:42:40,831 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 67 [2020-11-07 00:42:40,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:42:40,834 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2020-11-07 00:42:40,834 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-07 00:42:40,835 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2020-11-07 00:42:40,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-11-07 00:42:40,841 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:42:40,841 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:42:40,841 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-07 00:42:40,841 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:42:40,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:42:40,842 INFO L82 PathProgramCache]: Analyzing trace with hash -1506086719, now seen corresponding path program 7 times [2020-11-07 00:42:40,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:42:40,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2035485739] [2020-11-07 00:42:40,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:42:40,848 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:42:40,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:42:41,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:42:41,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:42:41,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-11-07 00:42:41,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:42:41,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-07 00:42:41,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:42:41,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-07 00:42:41,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:42:41,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-07 00:42:41,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:42:41,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-07 00:42:41,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:42:41,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-07 00:42:41,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:42:41,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-07 00:42:41,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:42:41,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-07 00:42:41,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:42:41,578 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-11-07 00:42:41,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2035485739] [2020-11-07 00:42:41,579 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:42:41,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2020-11-07 00:42:41,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978868537] [2020-11-07 00:42:41,580 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-07 00:42:41,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:42:41,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-07 00:42:41,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2020-11-07 00:42:41,583 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 20 states. [2020-11-07 00:42:43,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:42:43,683 INFO L93 Difference]: Finished difference Result 65 states and 66 transitions. [2020-11-07 00:42:43,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-11-07 00:42:43,684 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 74 [2020-11-07 00:42:43,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:42:43,686 INFO L225 Difference]: With dead ends: 65 [2020-11-07 00:42:43,686 INFO L226 Difference]: Without dead ends: 59 [2020-11-07 00:42:43,689 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=161, Invalid=1819, Unknown=0, NotChecked=0, Total=1980 [2020-11-07 00:42:43,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-11-07 00:42:43,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-11-07 00:42:43,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-11-07 00:42:43,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2020-11-07 00:42:43,706 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 74 [2020-11-07 00:42:43,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:42:43,706 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2020-11-07 00:42:43,706 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-11-07 00:42:43,706 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2020-11-07 00:42:43,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-11-07 00:42:43,707 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:42:43,708 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:42:43,708 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-07 00:42:43,708 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:42:43,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:42:43,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1924014913, now seen corresponding path program 8 times [2020-11-07 00:42:43,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:42:43,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [981154220] [2020-11-07 00:42:43,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:42:43,713 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:42:43,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:42:43,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:42:43,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:42:43,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-11-07 00:42:43,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:42:43,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-07 00:42:43,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:42:43,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-07 00:42:43,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:42:44,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-07 00:42:44,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:42:44,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-07 00:42:44,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:42:44,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-07 00:42:44,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:42:44,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-07 00:42:44,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:42:44,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-07 00:42:44,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:42:44,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-07 00:42:44,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:42:44,507 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-11-07 00:42:44,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [981154220] [2020-11-07 00:42:44,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:42:44,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2020-11-07 00:42:44,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387205705] [2020-11-07 00:42:44,509 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-07 00:42:44,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:42:44,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-07 00:42:44,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2020-11-07 00:42:44,510 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 22 states. [2020-11-07 00:42:46,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:42:46,928 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2020-11-07 00:42:46,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-07 00:42:46,928 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 81 [2020-11-07 00:42:46,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:42:46,930 INFO L225 Difference]: With dead ends: 69 [2020-11-07 00:42:46,930 INFO L226 Difference]: Without dead ends: 63 [2020-11-07 00:42:46,937 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=180, Invalid=2270, Unknown=0, NotChecked=0, Total=2450 [2020-11-07 00:42:46,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-11-07 00:42:46,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-11-07 00:42:46,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-11-07 00:42:46,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2020-11-07 00:42:46,995 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 81 [2020-11-07 00:42:46,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:42:46,995 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2020-11-07 00:42:46,995 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-11-07 00:42:46,996 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2020-11-07 00:42:46,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-11-07 00:42:46,997 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:42:46,997 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:42:46,997 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-07 00:42:46,998 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:42:46,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:42:46,998 INFO L82 PathProgramCache]: Analyzing trace with hash -1815934069, now seen corresponding path program 9 times [2020-11-07 00:42:46,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:42:46,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1599791785] [2020-11-07 00:42:46,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:42:47,002 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:42:47,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:42:47,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:42:47,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:42:47,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-11-07 00:42:47,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:42:47,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-07 00:42:47,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:42:47,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-07 00:42:47,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:42:47,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-07 00:42:47,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:42:47,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-07 00:42:47,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:42:47,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-07 00:42:47,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:42:47,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-07 00:42:47,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:42:47,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-07 00:42:47,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:42:47,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-07 00:42:47,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:42:47,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-07 00:42:47,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:42:47,833 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-11-07 00:42:47,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1599791785] [2020-11-07 00:42:47,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:42:47,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2020-11-07 00:42:47,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644561332] [2020-11-07 00:42:47,836 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-07 00:42:47,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:42:47,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-07 00:42:47,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2020-11-07 00:42:47,837 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 24 states. [2020-11-07 00:42:50,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:42:50,427 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2020-11-07 00:42:50,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-11-07 00:42:50,428 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 88 [2020-11-07 00:42:50,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:42:50,430 INFO L225 Difference]: With dead ends: 73 [2020-11-07 00:42:50,430 INFO L226 Difference]: Without dead ends: 67 [2020-11-07 00:42:50,432 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=199, Invalid=2771, Unknown=0, NotChecked=0, Total=2970 [2020-11-07 00:42:50,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-11-07 00:42:50,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-11-07 00:42:50,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-11-07 00:42:50,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2020-11-07 00:42:50,445 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 88 [2020-11-07 00:42:50,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:42:50,445 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2020-11-07 00:42:50,446 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-11-07 00:42:50,446 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2020-11-07 00:42:50,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-11-07 00:42:50,447 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:42:50,447 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:42:50,447 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-07 00:42:50,447 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:42:50,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:42:50,448 INFO L82 PathProgramCache]: Analyzing trace with hash -1550347829, now seen corresponding path program 10 times [2020-11-07 00:42:50,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:42:50,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1574036867] [2020-11-07 00:42:50,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:42:50,450 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:42:50,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 00:42:50,516 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 00:42:50,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 00:42:50,584 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 00:42:50,639 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-11-07 00:42:50,639 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-07 00:42:50,641 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-07 00:42:50,676 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 12:42:50 BoogieIcfgContainer [2020-11-07 00:42:50,676 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-07 00:42:50,679 INFO L168 Benchmark]: Toolchain (without parser) took 21167.76 ms. Allocated memory was 154.1 MB in the beginning and 323.0 MB in the end (delta: 168.8 MB). Free memory was 130.6 MB in the beginning and 182.2 MB in the end (delta: -51.5 MB). Peak memory consumption was 118.3 MB. Max. memory is 8.0 GB. [2020-11-07 00:42:50,680 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 125.8 MB. Free memory is still 96.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-11-07 00:42:50,682 INFO L168 Benchmark]: CACSL2BoogieTranslator took 287.66 ms. Allocated memory is still 154.1 MB. Free memory was 129.9 MB in the beginning and 121.0 MB in the end (delta: 8.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. [2020-11-07 00:42:50,688 INFO L168 Benchmark]: Boogie Preprocessor took 40.53 ms. Allocated memory is still 154.1 MB. Free memory was 121.0 MB in the beginning and 119.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-11-07 00:42:50,689 INFO L168 Benchmark]: RCFGBuilder took 486.92 ms. Allocated memory is still 154.1 MB. Free memory was 119.6 MB in the beginning and 136.4 MB in the end (delta: -16.8 MB). Peak memory consumption was 16.3 MB. Max. memory is 8.0 GB. [2020-11-07 00:42:50,691 INFO L168 Benchmark]: TraceAbstraction took 20337.46 ms. Allocated memory was 154.1 MB in the beginning and 323.0 MB in the end (delta: 168.8 MB). Free memory was 136.0 MB in the beginning and 182.2 MB in the end (delta: -46.2 MB). Peak memory consumption was 123.0 MB. Max. memory is 8.0 GB. [2020-11-07 00:42:50,705 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 125.8 MB. Free memory is still 96.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 287.66 ms. Allocated memory is still 154.1 MB. Free memory was 129.9 MB in the beginning and 121.0 MB in the end (delta: 8.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 40.53 ms. Allocated memory is still 154.1 MB. Free memory was 121.0 MB in the beginning and 119.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 486.92 ms. Allocated memory is still 154.1 MB. Free memory was 119.6 MB in the beginning and 136.4 MB in the end (delta: -16.8 MB). Peak memory consumption was 16.3 MB. Max. memory is 8.0 GB. * TraceAbstraction took 20337.46 ms. Allocated memory was 154.1 MB in the beginning and 323.0 MB in the end (delta: 168.8 MB). Free memory was 136.0 MB in the beginning and 182.2 MB in the end (delta: -46.2 MB). Peak memory consumption was 123.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 4]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] unsigned int input = __VERIFIER_nondet_uint(); [L13] CALL, EXPR id(input) [L7] COND FALSE !(x==0) [L8] CALL, EXPR id(x-1) [L7] COND FALSE !(x==0) [L8] CALL, EXPR id(x-1) [L7] COND FALSE !(x==0) [L8] CALL, EXPR id(x-1) [L7] COND FALSE !(x==0) [L8] CALL, EXPR id(x-1) [L7] COND FALSE !(x==0) [L8] CALL, EXPR id(x-1) [L7] COND FALSE !(x==0) [L8] CALL, EXPR id(x-1) [L7] COND FALSE !(x==0) [L8] CALL, EXPR id(x-1) [L7] COND FALSE !(x==0) [L8] CALL, EXPR id(x-1) [L7] COND FALSE !(x==0) [L8] CALL, EXPR id(x-1) [L7] COND FALSE !(x==0) [L8] CALL, EXPR id(x-1) [L7] COND TRUE x==0 [L7] return 0; [L8] RET, EXPR id(x-1) [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) [L8] return id(x-1) + 1; [L13] RET, EXPR id(input) [L13] unsigned int result = id(input); [L14] COND TRUE result == 10 [L15] CALL reach_error() [L4] __assert_fail("0", "id_o10.c", 4, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 36 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 20.2s, OverallIterations: 11, TraceHistogramMax: 11, AutomataDifference: 14.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 345 SDtfs, 356 SDslu, 1837 SDs, 0 SdLazy, 4343 SolverSat, 40 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 445 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 305 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1760 ImplicationChecksByTransitivity, 12.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=67occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 10 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...